This monograph provides an overview of the theory of stability analysis and its applications. It focuses on various methods for analyzing wheeled vehicle behavior. The authors provide both basic and advanced knowledge of the subject. The book summarizes their research experience and extensive teaching. A large number of practical examples are included throughout to help readers understand the theory introduced. The book has several original features: / The stability analysis of nonlinear systems that is carried out utilizes the definitions of stability in the sense of Lapunov ("mathematical stability") and the definitions of stability in the sense of Bogusz ("technical stability"). / The book emphasizes stability analysis of wheeled vehicles and their systems. / Computer-aided methods for investigations of wheeled vehicle behaviors are discussed.